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Finding the Fourth Proportional to 235,813.12, 325,450.32 and 139,038.88

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Solution

The fourth proportional to 235,813.12, 325,450.32 and 139,038.88 is: 191,890.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,813.12 : 325,450.32 = 139,038.88 : x
  2. Step 2: Convert to fraction form
    235,813.12/325,450.32 = 139,038.88/x
  3. Step 3: Cross multiply
    235,813.12x = 325,450.32 × 139,038.88
  4. Step 4: Simplify right side
    235,813.12x = 45,250,247,988.44
  5. Step 5: Solve for x
    x = 45,250,247,988.44/235,813.12
  6. Step 6: Final answer
    x = 191,890.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.